Multiple-voltage controller.



UNITED STATES liATENT err E. i

EMMETT W. S'lULL, or NoRwoon'oHIo, ASSIGNOR 'ro ALLIS-CHALMERS COMPANY,A, con- PORATION orNEw JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURINGCOMPANY,

- 'A- CORPORATION or OHIO;

f No.9 22,823.

To cll whom it may concern: l'

Be it k'nown-thatl, EMMn'rr W. STULL, a citizen of the United States,residing at 'Norwood, in the county of Hamilton and. Y 5 Stateof Ohio,have invented certain. new

1.5 voltage system. All the controllers which so far have been devisedto do this howeyer have bee'n so constructed that w lien'the change ismade the armature circuit is broken in order 'to reveiita short-circuitbetween any two 0 the, multiple Voltage I mains. This momentaryinterruption of the circuit-is oftentimes disadvantageous.

It is the obj ectof my present invention to so construct amotorcontrolle'r for multiple 25,. voltage svstems 'that the, motor maybe changed from one set of mains-t0 another without necessitating aninterruption of the motor circuit and without any danger ofshort-circuiting any two mains of the multi- *3 0 plevolta e system.

, With't is obgectin view myinvention consists broadly-o thecombination-of multiple- ;voltage mains, ,a translating device and acontroller-arranged to change the conne'ctionsofthe translating devicefrom any. set of mains to' another without opening the circuit. I I

In a more specific'aspect my invention consists of t hefconibination ina s stern of motor control,'of multivoltage supp y mains,

amotor, and a controller therefor, said con troller being constructedand arranged to chan e the connections of the motor armature rom any setof mains to another, and as said change is made to insert resistancebetween 'those mains between which one armature terminal is beingchanged.

, Other novelfeatures of my invention w1ll appear hereinafter igure 1 isan elevation of the upper part of a controller embodying my invent1on;.

and Fig.2 is a diagrammatic view showing the electrical connections ofsuch a controlleri' Specification of Letters Patent. n

the controller.

MULTIrLE-VO TAGE CONTROLLER.

Patented May 25, 1909..

. Application filed October 31, 1906. Serial No. 341,576.

Referring to thedrawing's 10 represents a controller drum which ismounted ona K shaft 11', placed in the usual casing 13 and operable bythe usual handle 12. Thedrum here illustrated has nine operativepositions and is divided'into-two electrical sections 14- and 15, eachofthese sections having a number of electrically connected contactsegments J16 thereon. These segments of the controller cooperate withthe stationary contact fingers '17; to 25- inclusiive. The upper andlower contact fingers 17 and 25 are connected to the two terminals ofthe armature 26 of the motor A to be regulated. Fin ers 18,21 and 24are.ccnnected respective y to the three mains 27, 2S and 29 ofa multiplevoltage system. .As usual in three wire multiple voltage systems such ashere illustrated, the voltages arc-'90, 160, and

the sum of t liese two, 250. Connected to the contact fingers 18, 1 9and 20 is a sectional resistance 30, while a similar resist' ance 31 isconnected to the contacts 22, 23 and 24. The field winding 32 of themotor A is preferably ermanently connected between the outsi e mains 27and 29 of the multiple voltagesystem, and controlled by a separateswitch 33. A mainswitch 34 controls the entire circuits of the motor andThe strength of the field winding.32 may be regulated by a rheostat 35,which, if desired, may be combined with the controller 10. 5 1

The 0 eration of the controller is as follows hen the drum .10 is movedinto position 1, the switches 33 and 34 being closed, the motorarmature'26'is connected-between the mains 28 and 29 with the entireresistance 31 in circuit. T l10'I110l301' now starts. As the controlleris moved to positions .2 and 3 respectively, the two sections of thercsis'tance31 will be cut out of circuit successively.

In position 3, the first running osition of the controller, the,armature 26 ias impressed thereon the full 90 volts between .the mains28 and 29 As the controller is moved from position 3 to position l, thecontact 'fin ers 20 and 21 are first connected together, t us connectingthe mains 27 and 28 t gether through the entire resistance 30. Thisconnection lasts only for an instant, as immedi, ately thereafter thecontact finger 21 breaks connection with the segment with which it hadat first engaged. Aboutthis time the resistance 31 is again included inthe armature circuit. momentarily connected across the high voltageoutside mains, but both resistances,

5 30 and 31 are fully in circuit and prevent the impressing of a toohigh voltage on the motor armature. Next the fingers 21 and 22 areconnected by the drum section 15, thus connecting the mains 28 and 29together through the entire resistance31. Immediately, however, thecontact finger 22 is disconnected from the drum section 15. Thus inosition 4 the motor armature is connected etween the mains 27 and 28with the entire resistance 30 in circuit therewith. As

the drum is moved to ositions 5 and 6 respectively, the two sections ofthe resistance 30 are successively cut out. In position 6, the secondrunning position of the controller,

the armature has impressed thereon the full ]60 volts between the mains27 and28. As

the controller is moved from position 6 to position 7 the contactfingers 21 and 22 are again momentarily connected together to 25 connectthe mains 28 and 29 through the entire resistance 31. Immediately,however, the contaot finger 21 leaves the segment 16 of drum section 15with which it had been in engagement in position 6. The motor arm a- 30time 26 is now connected between the outer mains 27 and 29 with the fullresistance 3]. in circuit. As the controller is moved into positions 8and 9 respectively, the two sections of resistance 31 are againsuccessively 35 'cut 'out of circuit. In position 9, the third and lastrunning position of the controller, the armature 26 has impressedthereon 'the full 250 volts between the outer mains 27 and 29. As thecontroller has been moved through these positions 1 to 9 the motorarmature circuit has not been interru ted, ishorhcircuiting of the mainsof the mu tiple -i'Olti cm being revented by means of the r ces 30 and51. During the backward movement of the controller, the reverse of theoperation just described takes place, the controller being moved frompo- "sition 9 to position 1 without interrupting the motor circuit andwithout short-circuitany of the mains of the multiple voltage system.

' For the gake of sim licity I have shown my invention as app ied to athree wire multiple voltage system but it is equally ap- *plicable toother multiple voltage systems.

The number of sections of the resistance 30 'and 31 may bezva-ried asdesired tii'fsfiit the yJrequirements bftlre particular-system." Alsojany desired number of niotorsbe simult taneously controlled. lvlany'otli-er modifications can be made in. tlieprecise;arrangements iherein shown anddescribed, and all such which do not involve a departurefrom Fthe spirit and scope of myinvention I aim to "foover in thefollowingiclaims.

The motor armature is how What I claim as new and desire to secure byLetters Patent is 1. In combmation, multiple voltage mains,

a translating device, a multiple voltage controller having fixed andmovable contacts constructed and arrangedto change the ,connectionsofthe translating device from any .pairof said mains to: another,without interrupting the circuit.

2. In a system of motor control, a motor,

multiple voltage mains, 8f1d a controller arranged to connect the motorbetween any set of said mains for. rotation in the same direction, andto change the connections of the motor from one set of mains to anotherwithout opening the motor circuit.

3-. In a system. of motor control, a motor, multiple voltage mains, anda controller arranged to change the connections of the motor from anyset of said mains to another without interrupting the motor circuit andwithout short-circuiting any-of the multiple voltage mains.

4. In asystem of motor control, multiple voltage mains, one or moremotors, a resistance, and a controller arranged to connect said motor ormotors between any set of said mains for rotation in the same direction,and to change the connections of the motor or motors from one set ofmains to another while maintaining the continuity of the motor circuitsand to properly I insert the resistance while making such changes toprevent short-circuiting of any set of the multiple-voltage mains.

5. A controller arranged to connect a motor armature between differentsets of mains, and a resistance, said controller having connectionsarranged to insert part of saidresistance between the two mains between.which an armature terminal is changed as said change is being made andto use the whole of said resistance for speed control.

6. In a system of motor control, a motor, multiple voltage mains, aresistance, and a controller arranged to change the connections of themotor armature from one set of mains to another while maintaining thecontinuity of the circuit of said armature, and as such change is beingmade to insert part of said resistance temporarily in the armaturecicuit and between the two mains, between which an armature terminal isbeing changed, different parts of such resistance being used for the twoarmature terminals.

7. In a system of motor control, a motor, multiple voltage mains, asectional resistance, and a controller arranged to change theconnections of the motor armature from any pair of said mains toanother, and as such change is being madeto insert sections of saidresistance temporarily in the armature circuit and between the two mainsbetween which an armature terminalis-changed.

.8. In a system of motor control, the com: 130

I a motor, and a resistance, 0

I supply circuit for the same direction of rotation, and to insert saidresistance temporarily [is made. v 12. In a system of motor control, thecomthe connections of the motor armature from 3 any set of mains of saidsupply circuit to anbination of a multivcitage supply circuit, a motor,and a controller arranged to connect mainsfof thefsupply' circuitwhenever 'a" v change'ln the connections of thearmature bination ofamultivoltage supply circuit, a

motor, and a contrdller arranged to connect the motor to, any

said controller having connections for tem porar ly Inserting aresistance between two mains of the supply, circuit when a change in theconnections of the armaturetakes place.

.a motor, and a'sectional resistance, of a conarmature and toinsertsections-of said resist armature and to insert a part of'saidiesist circuit temporarlly and also in the armature rotation and toinsert ortions of said resistance between two of t e mains of the supplycircuit temporarily and bination with a multivoltage supply circuit,

the'motor to any set of m'ams of'the supply circuit, "said controllerhav' 1 connections for temporarily inserting a resistance in themotion-armature circuit and between two takes. lace. I 9.' na system ofmotor control, the com-' set of mains of the supply 5 circu t .fOliIOlJMJlOIl in the. same direction,

10. In a system of motor control, the c'om binatlon Wllill, amultivoltage supply circuit,

troller constructed and arranged to change the connections of the motorarmature from any set of mains of said sup 1y circuit to another Withoutinterrupting the circuit of said ance temporarily between two of themains of the supply circuit assaid change is made. 11. i In a system of.motor control, the cornbination with a-multivolta e supply circuit,

' Ia controller constructed and arranged to connect the motor armaturebetween any-set of mains of said between two of the mains of the supplycircuit as a change intthe armature connections bination with amultivoltage supply circuit, amotor, and a variable resistance, of acontroller' constructed and arranged to change other withoutinterrupting the circuit of said.

ance between two of the mains ofthe supply-' circuit as said chan e ismade. i 13. In a system 0 motor control, the combination with amultivoltage supply circuit, a'motor, and a'variable resistancefof acontroller constructed andarranged to connect the motor armature to anyset of mains of said supply circuit for the same direction of also inthe armature v. l circu t as a change 1n the armature connectionsismade, v I

{14. In a system of motor control, the coma motor, an a variableresistance, of a controller constructed and arranged to change? theconnections of the motor armature from .i

any set of mains of said supply circuit to another without interruptingthe circuit of said armature and to insert part of said resistancebetween two of the mains of the supply cir cuit temporarily and also inthe armature circuit as said change is made, and to gradually out saidresistance out ofthe armature cir- 15. In a system oi motor control, thecombination with a multivoltage supply circuit,

a motor, and a variable resistance, of a controller constructed andarranged to change the connections of the. motor armaturefrom any set ofmains of said supply circuit to an-' other and to insert part of saidresistance be tween two of the mains of'the supply circuit temporarilyand also in the armature'circuit as said change is made, and togradually out said resistance out of the armature circuit.

16. In a system of motor control, the combination of Inultivoltagesupply mains, a mo tor, and a controller therefor, said controller beingconstructed and arranged to change the connections of the motor arnmturefrom any set of said mains to another, and as such change is made toinsert a resistance between those mains between which an armatureterminal is being changed.

17. In a system of motor control, the com bination of multivoltagesupply mains, a motor, and a controller therefor, said controller be ngconstructed and arranged to change the connections of the motor armaturefrom any set of said mains to another, and as such resistance betweenthose mains between which an armature terminal is being changed.

19. In a system of motor control, the combination of multivoltage'supply mains, a motor, and a controller therefor, said controller beingconstructed and arranged to chan e the connections of the motor armaturerom any set. of said mains to another without breaking the circuit ofsaid armature and as such change is made to insert a resistance betweenthose mains between which an armature terminal is being changed, andalso to msert a resistance in the armature circuit.

20. In a system of motor control, the combination of 'multivoltagesupply mains, a motor, and a controller therefor, said controller beingarranged to change the'connections of the motor armature from any pairof said mains to another without interrupting on said armature or ashort-circuit between any two of the supply-mains.

21. In a system of motor'control, the combination of' multivoltagesupply mains,'a

motor, and a controller therefor, said con. troller being arranged tochange the connections of the motor armature from any set of said mainsto another without interrupting the circuit of said armature, and whenmale ing said change to properly insert resistances to prevent ashort-circuit between any two of the supply mains.

22. In a system of motor control, the combination of multivoltage supplymains, a motor, and a controller therefor, said controller beingarranged to connect the motor armature between any set of said mains forrotation in the same direction, and when making a change in thearn'iature connections to properly insert resistances to prevent a toosudden variation of voltage on said armature or a short-circuit betweenany two of the suppl y mains.

23. In a system of motor control, the combination of multivoltage supplymains, a

motor, and a controller therefor, said controller being arranged tochange the connecticns of the motor armature from any set of said mainsto another, and when making said change to properly insert resistancesto prevent a short-circuit between any two of the g 1 supply mains.

24, In a system of motor control, the coinbmation oi multivoltage supplymains, a

'motor, and a controller therefor, said controller being constructed andarranged to change the connections of the motor armature from any set ofthe mains to another by firstconnectmg the armature. terminal to be.changed to the main desired and then disconnecting it from the main towhich it had been originally connected.

25. In a system of motor control, the combination of multivoltage mains,a motor, a

controller therefor, and a resistance, said controller being arranged tochange the connections of the motor armature from any set of themains toanother by first connecting the armature terminal to be changed to apoint on the resistance and the resistance between the mains betweenwhich said terminal is to be changed, and then disconnecting saidterminal from the main to which it had been first connected. 7

26. A controller arranged to connect a motor armature between diilcrentsetsof mains, and a resistance, said controller having connectionsarranged to insert part of said resistance between the two mains between which one armatureterminal is changed as said change is beingmade'and another part .oi'said resistance between the mains betweenwhich the other armature terminal is changed as said latter change isbeing made.

In testimony whereof'I aflix my signature, in the presence 01' twowitnesses.

' uEMMETT W.

itnessesz G OQB. SonLEY, ARTHUR 'F. KWIS.

STULL.

